In this photo taken on Sunday, March 15, 2015, a Nenets man takes part in a reindeer race at the Reindeer Herder's Day in the city of Nadym, in Yamal-Nenets Region, 2500 km (about 1553 miles) northeast of Moscow, Russia. For the indigenous nomadic Nenets people, the Reindeer Herder’s Day offers a chance to show their prowess in wrestling, high jumps and other traditional local sports, but, above all, reindeer races. (Photo by Dmitry Lovetsky/AP Photo)

In this photo taken on Sunday, March 15, 2015, a Nenets man rides in a reindeer sled at sunset after the Reindeer Herder's Day in the city of Nadym, in Yamal-Nenets Region, 2500 kilometers (about 1553 miles) northeast of Moscow, Russia. Some participants at the Reindeer Herder's Day travel hundreds of kilometers across the frozen tundra to attend the competition in the region in northern Siberia, more than half of the territory of which lies above the Arctic Circle. (Photo by Dmitry Lovetsky/AP Photo)

In this photo taken on Sunday, March 15, 2015, Nenets women speak at sunset after the Reindeer Herder's Day holiday in the city of Nadym, in Yamal-Nenets Region, 2500 kilometers (about 1553 miles) northeast of Moscow, Russia. (Photo by Dmitry Lovetsky/AP Photo)

In this photo taken on Sunday, March 15, 2015, a Nenets woman rides steers a sled during a reindeer race at the Reindeer Herder's Day in the city of Nadym, in Yamal-Nenets Region, 2500 kilometers (about 1553 miles) northeast of Moscow, Russia. (Photo by Dmitry Lovetsky/AP Photo)

In this photo taken on Sunday, March 15, 2015, Nenets children attend the Reindeer Herder's Day holiday in the city of Nadym, in Yamal-Nenets Region, 2500 kilometers (about 1553 miles) northeast of Moscow, Russia. (Photo by Dmitry Lovetsky/AP Photo)

In this photo taken on Sunday, March 15, 2015, a Nenets family walks after the Reindeer Herder's Day in the city of Nadym, in Yamal-Nenets Region, 2500 kilometers (about 1553 miles) northeast of Moscow, Russia. (Photo by Dmitry Lovetsky/AP Photo)

In this photo taken on Sunday, March 15, 2015, a Nenets man pulls his reindeer at the Reindeer Herder's Day in the city of Nadym, in Yamal-Nenets Region, 2500 kilometers (about 1553 miles) northeast of Moscow, Russia. (Photo by Dmitry Lovetsky/AP Photo)

In this photo taken on Sunday, March 15, 2015, a Nenets man rides a reindeer sled at the Reindeer Herder's Day in the city of Nadym, in Yamal-Nenets Region, 2500 kilometers (about 1553 miles) northeast of Moscow, Russia. (Photo by Dmitry Lovetsky/AP Photo)

In this photo taken on Sunday, March 15, 2015, a Nenets family walks after the Reindeer Herder's Day holiday in the city of Nadym, in Yamal-Nenets Region, 2500 km (about 1553 miles) northeast of Moscow, Russia. (Photo by Dmitry Lovetsky/AP Photo)

In this photo taken on Saturday, March 14, 2015, Nenets men wrestle during a competition at the Reindeer Herder's Day in the city of Nadym, in Yamal-Nenets Region, 2500 kilometers (about 1553 miles) northeast of Moscow, Russia. (Photo by Dmitry Lovetsky/AP Photo)

In this photo taken on Sunday, March 15, 2015, a Nenets woman walks by chums at the Reindeer Herder's Day in the city of Nadym, in Yamal-Nenets Region, 2500 kilometers (about 1553 miles) northeast of Moscow, Russia. (Photo by Dmitry Lovetsky/AP Photo)

In this photo taken on Saturday, March 14, 2015, Nenets women take photos as they attend the Reindeer Herder's Day holiday in the city of Nadym, in Yamal-Nenets Region, 2500 kilometers (about 1553 miles) northeast of Moscow, Russia. (Photo by Dmitry Lovetsky/AP Photo)

In this photo taken on Sunday, March 15, 2015, a Nenets boy attends the Reindeer Herder's Day holiday in the city of Nadym, in Yamal-Nenets Region, 2500 kilometers (about 1553 miles) northeast of Moscow, Russia. (Photo by Dmitry Lovetsky/AP Photo)

In this photo taken on Sunday, March 15, 2015, Nenets men prepare for reindeer races at the Reindeer Herder's Day holiday in the city of Nadym, in Yamal-Nenets Region, 2500 kilometers (about 1553 miles) northeast of Moscow, Russia. (Photo by Dmitry Lovetsky/AP Photo)

In this photo taken on Sunday, March 15, 2015, a Nenets woman and her child attend the Reindeer Herder's Day holiday in the city of Nadym, in Yamal-Nenets Region, 2500 kilometers (about 1553 miles) northeast of Moscow, Russia. (Photo by Dmitry Lovetsky/AP Photo)

In this photo taken on Saturday, March 14, 2015, Nenets people ride in a reindeer sleigh during the Reindeer Herder's Day holiday in the city of Nadym, in Yamal-Nenets Region, 2500 kilometers (about 1553 miles) northeast of Moscow, Russia. (Photo by Dmitry Lovetsky/AP Photo)

In this photo taken on Saturday, March 14, 2015, a Nenets boy sits on a sleigh as he attends the Reindeer Herder's Day holiday in the city of Nadym, in Yamal-Nenets Region, 2500 kilometers (about 1553 miles) northeast of Moscow, Russia. (Photo by Dmitry Lovetsky/AP Photo)

In this photo taken on Sunday, March 15, 2015, Nenets children attend the Reindeer Herder's Day holiday in the city of Nadym, in Yamal-Nenets Region, 2500 kilometers (about 1553 miles) northeast of Moscow, Russia. (Photo by Dmitry Lovetsky/AP Photo)

In this photo taken on Saturday, March 14, 2015, a Nenets man sits on a reindeer sleigh at the Reindeer Herder's Day holiday in the city of Nadym, in Yamal-Nenets Region, 2500 kilometers (about 1553 miles) northeast of Moscow, Russia. (Photo by Dmitry Lovetsky/AP Photo)

In this photo taken on Sunday, March 15, 2015, a Nenets man examines a stuffed bear at the Reindeer Herder's Day in the city of Nadym, in Yamal-Nenets Region, 2500 kilometers (about 1553 miles) northeast of Moscow, Russia. (Photo by Dmitry Lovetsky/AP Photo)

In this photo taken on Sunday, March 15, 2015, Nenets men compete in a reindeer race at the Reindeer Herder's Day in the city of Nadym, in Yamal-Nenets Region, 2500 kilometers (about 1553 miles) northeast of Moscow, Russia. (Photo by Dmitry Lovetsky/AP Photo)